Beginning in season 4 of "Smallville," Clark Kent (Tom Welling) slowly begins meeting other DC superheroes. In "Run," it's Bart Allen/Impulse (Kyle Gallner). Season 5 had Arthur Curry/Aquaman ...

But Welling and Padalecki did share a scene in an unlikely movie: the 2003 comedy Cheaper by the Dozen. Cheaper by the Dozen stars Steve Martinas college football coach Tom Baker, who takes a new job ...